The phase separation behavior of polymer blend thin films of 100–150 nm was studied using differential AC Chip calorimetry. By taking advantage of the low sensor and sample mass inherent to chip calorimetry, a new methodology based on temperature jumps was developed. This methodology allowed the construction of the state diagram of polymer Basket Blazer Bebe blend thin films as evidenced for two model systems (PVME/PS and PVME/Phenoxy) displaying a lower critical solution temperature behavior.
The state diagram in thin films was compared to the one obtained in bulk using Modulated Temperature DSC. In comparison with bulk, a lower phase separation temperature and a broadening of the homogeneous glass transition temperatures is observed for both model systems. This might be an indication of a surface induced ‘destabilization’ by composition gradients which are not present in bulk.
Controlled fracture tests are required for the accurate determination of Chaussures Nike Blazer the toughness parameters of materials in order to assure the full conversion of the supplied energy into crack surface energy. From the three parameters involved in the test, load, displacement of the load point and crack mouth opening displacement (CMOD), this latter is the only one that continuously increases as fracture proceeds. Therefore, the CMOD has been proposed as control variable for the stable fracture tests. In this work, a new equipment to perform stable fracture tests of single edge V-notch beams (SEVNB) of ceramics in three points bending controlled by the CMOD is presented. The developed equipment allows performing stable fracture tests of extremely brittle materials. The equipment is presented together with results obtained Basket Nike Blazer Femme Noir for fine grained aluminium–magnesium aluminate and alumina ceramics.
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